{"id":5212,"date":"2017-11-06T16:23:36","date_gmt":"2017-11-06T21:23:36","guid":{"rendered":"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/?p=5212"},"modified":"2021-08-10T15:17:52","modified_gmt":"2021-08-10T20:17:52","slug":"3d-object-classification-via-spherical-projections","status":"publish","type":"post","link":"https:\/\/engineering.purdue.edu\/cdesign\/wp\/3d-object-classification-via-spherical-projections\/","title":{"rendered":"3D Object Classification via Spherical Projections"},"content":{"rendered":"<p>In this paper, we introduce a new method for classifying 3D objects. Our main idea is to project a 3D object onto a spherical domain centered around its barycenter and develop neural network to classify the spherical projection. We introduce two complementary projections. The first captures depth variations of a 3D object, and the second captures contour-information viewed from different angles. Spherical projections combine key advantages of two main-stream 3D classification methods: image-based and 3D-based. Specifi- cally, spherical projections are locally planar, allowing us to use massive image datasets (e.g, ImageNet) for pre-training. Also spherical projections are similar to voxel-based methods, as they encode complete information of a 3D object in a single neural network capturing dependencies across different views. Our novel network design can fully utilize these advantages. Experimental results on ModelNet40 and ShapeNetCore show that our method is superior to prior methods.<a href=\"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/3d-object-classification-via-spherical-projections\/3dvsphere\/\" rel=\"attachment wp-att-5554\"><br \/>\n<\/a> <a href=\"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/3d-object-classification-via-spherical-projections\/3dvspherebanner\/\" rel=\"attachment wp-att-5555\"><img loading=\"lazy\" class=\"aligncenter size-large wp-image-5555\" src=\"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/wp-content\/uploads\/2017\/11\/3dvspherebanner.png\" alt=\"3dvspherebanner\" width=\"358\" height=\"215\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/3d-object-classification-via-spherical-projections\/3dvsphere\/\" rel=\"attachment wp-att-5554\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-5554\" src=\"https:\/\/Engineering.Purdue.edu\/cdesign\/wp\/wp-content\/uploads\/2017\/11\/3dvsphere.png\" alt=\"3dvsphere\" width=\"350\" height=\"204\" srcset=\"https:\/\/engineering.purdue.edu\/cdesign\/wp\/wp-content\/uploads\/2017\/11\/3dvsphere.png 350w, https:\/\/engineering.purdue.edu\/cdesign\/wp\/wp-content\/uploads\/2017\/11\/3dvsphere-300x175.png 300w, https:\/\/engineering.purdue.edu\/cdesign\/wp\/wp-content\/uploads\/2017\/11\/3dvsphere-250x146.png 250w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this paper, we introduce a new method for classifying 3D objects. Our main idea is to project a 3D object onto a spherical domain centered around its barycenter and develop neural network to classify the spherical projection. We introduce two complementary projections. The first captures depth variations of a 3D object, and the second [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5555,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_links_to":"","_links_to_target":""},"categories":[363,359,268],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>3D Object Classification via Spherical Projections - Convergence Design Lab, Purdue University<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/engineering.purdue.edu\/cdesign\/wp\/3d-object-classification-via-spherical-projections\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3D Object Classification via Spherical Projections - Convergence Design Lab, Purdue University\" \/>\n<meta property=\"og:description\" content=\"In this paper, we introduce a new method for classifying 3D objects. Our main idea is to project a 3D object onto a spherical domain centered around its barycenter and develop neural network to classify the spherical projection. We introduce two complementary projections. 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